Question

There was no red arc. so please help me on this. its for geometry ​

Answer 1

21. x=70

22. x=15

*Not sure what the red arc is, but I found the value of x for both 21 and 22*

Explanation:

Let's start with 21 first.

Line AB is a straight line, meaning the arc length of AB is 180 degrees. So,

(2x-30)+x=180

let's solve:

3x-30=180

3x=210

x=70

I'm not sure what the red arc is, so I can't help you there.

Next, 22.

All the arcs in a complete circle need to add up to 360 degrees, so:

4x+6x+7x+7x=360

simplify first:

24x=360

let's solve:

x=15

Again, not sure where or what the red arc is, so can't help again. I hope that the x values help.